[单选题]The underflow of a B-tree happens whenPJc答案窝(daanwo.com)-大学生作业答案及考资分享平台
B树的下溢发生于：PJc答案窝(daanwo.com)-大学生作业答案及考资分享平台
Athe height of the tree decreases B树高度减少PJc答案窝(daanwo.com)-大学生作业答案及考资分享平台
Bthe property of the B-tree is violated due to inserting a key 插入关键码后违反了B树的性质PJc答案窝(daanwo.com)-大学生作业答案及考资分享平台
Cthe property of the B-tree is violated due to deleting a key 删除关键码后违反了B树的性质PJc答案窝(daanwo.com)-大学生作业答案及考资分享平台
Dinserting a key to a leaf node 在叶节点插入关键码